feat(IDEA 2021.1.3): rework for 2021.1.3

feat(*): install SDKMAN! & use upgraded groovy lang

feat(*): install SDKMAN! & use upgraded groovy lang

fix(Container): add git to avoid startup error

release 2019.2.3

Tag IDEA 2018.3.6 release

fix - updated 1.5.4

Release 1.5.3 - Render inspection errors to STDERR

Bugfix release : correct return code & version string

1.5.1 bugfix release